4. Which of the following is true about parallax? a) the nearest stars have the samples parallax angles
b) the parallax angles of distant starts are too small to measure
c) it is used to measure distances to stars
d) both a and b

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 23.7n and the spring scale reads 13.8n. what is the magnitude of the force that earth exerts on the bag?